HomeMy WebLinkAbout20230023 23 Richard Final Subdivision Engineering Letter Report - Sanitary Sewer & WaterAdvance Engineering & Surveying, PLLC
Consulting in: Civil &Environmental Engineering •Land Surveying •Land Development
11 Herbert Drive Phone: (518) 698-3772
Latham, N.Y. 12110 Email:ncostape@gmail.com
Nicholas Costa, PE
Engineering Report
For Sanitary Sewer & Water
Proposed Residential Development at
23 Richard Avenue
City of Saratoga Springs, NY
Dated: August 2022
Proposed Development
The proposed residential development located at 23 Richard Avenue in the City of
Saratoga Springs is shown on plans prepared by Advance Engineering & Surveying
PLLC. The proposed development encompasses the subdivision of the existing parcel
into three residential lots; two of the lots would be developed with new homes while
the third already is developed with a home.
Proposed Utilities
Water service: - It is proposed to provide 3/4-inch diameter type K water service to
each of the new homes. The water service will be tapped from the existing 8-inch
diameter water main that is located at the northerly boundaries of Penn Street, in
front of the property.
Sanitary Sewer Service: - Each home will connect to the existing 8-inch PVC sanitary
sewer system located at Richard Avenue. This will require a private utility easement
between the two new proposed lots. The new laterals will connect to an existing
Manhole at Richard Avenue which has an 8-inch gravity sewer outlet pipe and is
owned by the City of Saratoga Springs.
Design Standards Estimated Flow
The hydraulic loading of the two new homes are calculated as following:
Hydraulic Load
The average daily flows for the two new laterals are estimated based on the following:
Utilizing the generation rate of 110 Gallons per day per bedrooms and based on 3
bedroom per homes.
Sanitary Sewer
Single Family Homes: 2 Lots
Loading Values:
"Engineering Innovative & Sustainable Solutions"
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2 Homes x 3 bedrooms per Home x 110 GPD = 660 GPD
Total Estimated Average Daily Sewer Loading for single family use: 660 GPD or 0.46
gallons per minute (GPM)
Peak Daily Sewer Loading: 0.46 x 4.00 = 1.84 GPM say 2 GPM
The existing 8-inch diameter PVC gravity sewer has sufficient capacity to manage the
additional flows tributary from the proposed new laterals.
Domestic Water
The estimated average daily water usage for the proposed Development is 660 GPD
or 0.46± gallons per minute (gpm), and the maximum daily usage is estimated to be
approximately twice the average or 1,320 GPD or 0.92± gpm. The maximum
instantaneous demand is calculated at 1.84 gpm or four times the daily average
flow.
The existing 8-inch diameter DIP water main has sufficient capacity to supply the
demands from the two new homes proposed at 23 Richard Avenue.
CONCLUSION
The proposed three lot residential subdivision will connect to the existing City of
Saratoga Springs sanitary sewer gravity main and water main that currently are
located nearby. The sanitary sewer and water laterals will be constructed by the
developer of the new homes and there will not be any expenses to the City for these
proposed laterals. The existing City sanitary sewer and water mains have sufficient
capacity to provide these residential lots with municipal services.
Respectfully su
Advance Enaine'rtn ILA urn
Nicholas
/Engineering
_LC
0740
St,,
tter Report - Sanitary
Sewer & water.docx